Security arrangements at 345 Park Avenue were typical of high-end New York offices, according to Dave Komendat, senior security adviser at International SOS
A security system at a Manhattan office tower identified the approaching gunman as a potential threat seconds before he opened fire, killing four people, according to former federal officials familiar with New York’s building security operations.
Footage from 345 Park Avenue, timestamped 6:26:52pm ET, shows a man carrying an assault-style rifle at his side. A computer-generated yellow box outlines his figure — an alert produced by software designed to analyse live CCTV feeds for threats requiring immediate action. Police received the first emergency call just over a minute later.
The officials said the yellow box would have been intended to warn guards at the lobby security desk. It remains unclear whether the alert prompted any action. Rudin Management, the tower’s owner, declined to comment on the system or the security response.
Police identified the attacker as 27-year-old Shane Tamura, a Las Vegas resident with a history of mental illness. He shot dead two security officers — one of them a police officer on a paid security detail — along with a Rudin employee and an investment firm executive, before killing himself.
Michael Dorn, executive director of Safe Havens International and a former anti-terrorism adviser, said that even with AI-assisted detection, rapid human response was critical. “You can’t automate this away,” he said, noting that some systems allow guards to initiate instant lockdowns of doors, elevators and access points.
Security arrangements at 345 Park Avenue were typical of high-end New York offices, according to Dave Komendat, senior security adviser at International SOS. The lobby remained open to the public, with visitors checked in before accessing elevators behind turnstiles. The offices included bathrooms doubling as bulletproof safe rooms, which Mayor Eric Adams said likely saved lives.
Following the shooting, numerous companies in the city have increased security, adding guards and tightening procedures, according to the Partnership for New York City, which represents more than 300 firms in the financial and corporate sectors.
